1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <linux/types.h> |
3 | #include <linux/errno.h> |
4 | #include <linux/uaccess.h> |
5 | |
6 | #include <asm/sfp-machine.h> |
7 | #include <math-emu/soft-fp.h> |
8 | #include <math-emu/double.h> |
9 | #include <math-emu/single.h> |
10 | |
11 | int |
12 | lfs(void *frD, void *ea) |
13 | { |
14 | FP_DECL_D(R); |
15 | FP_DECL_S(A); |
16 | FP_DECL_EX; |
17 | float f; |
18 | |
19 | #ifdef DEBUG |
20 | printk("%s: D %p, ea %p\n" , __func__, frD, ea); |
21 | #endif |
22 | |
23 | if (copy_from_user(to: &f, from: ea, n: sizeof(float))) |
24 | return -EFAULT; |
25 | |
26 | FP_UNPACK_S(A, f); |
27 | |
28 | #ifdef DEBUG |
29 | printk("A: %ld %lu %ld (%ld) [%08lx]\n" , A_s, A_f, A_e, A_c, |
30 | *(unsigned long *)&f); |
31 | #endif |
32 | |
33 | FP_CONV(D, S, 2, 1, R, A); |
34 | |
35 | #ifdef DEBUG |
36 | printk("R: %ld %lu %lu %ld (%ld)\n" , R_s, R_f1, R_f0, R_e, R_c); |
37 | #endif |
38 | |
39 | if (R_c == FP_CLS_NAN) { |
40 | R_e = _FP_EXPMAX_D; |
41 | _FP_PACK_RAW_2_P(D, frD, R); |
42 | } else { |
43 | __FP_PACK_D(frD, R); |
44 | } |
45 | |
46 | return 0; |
47 | } |
48 | |